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Plants (NS Unit 4)

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by

ELENA LÓPEZ HERRERA

on 6 April 2017

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Transcript of Plants (NS Unit 4)

PLANTS
They are living things.
They are multicellular organisms.
They are producers -make their own food.
They need water, soil -minerals, sunlight and warthm to grow.


It carries water and minerals from the roots to the rest of the plant. It supports the plant.
They grow from the stems/branches.
They use sunlight to make their own food.
They are underground.
They absorb water and minerals.
They fix the plant into the ground.
UNIT 4: PLANTS
Nutrition

Interaction

Reproduction
Nutrition
Interaction
Plants interact like animals and people.
Flowering plants
Non-flowering plants
Angiosperms
Gymnosperms
Mosses
Ferns
Angiosperms
Flowering plants
They have beautiful flowers.
They produce fruit with seeds inside.
Examples: roses, daffodils, some bushes, trees and grasses.
Gymnosperms
They have small flowers.
They don´t produce fruit.
The seeds develop inside cones.
Examples: Pine trees
Non-flowering plants
Mosses
Ferns
They are very small and grow on rocks and tree trunks.
Ferns need damp conditions to survive
They have large leaves.
DECIDUOUS TREES

Trees lose their leaves in autumn
EVERGREEN TREES

Their leaves are green all year
DECIDUOUS AND EVERGREEN PLANTS


Male organs:
STAMENS
(2 parts: a
FILAMENT
and an
ANTHER

that produces pollen (male reproductive cell).
Female organ:
PISTIL
(4 parts:
OVARY
,
OVULES
(female reproductive cell) and the
STYLE
. The style connects the ovary to the
STIGMA
that is sticky and catches the pollen).
The pollen travels down the style and into the ovary and when it joins an ovule they make a seed . This process is called
FERTILISATION.

POLLINATION
occurs when pollen from the stamen lands on the stigma of a plant).
1. The roots absorb water and minerals from the soil.

2. Plant cells (called
XYLEM CELLS
transport this mixture of water and minerals, called
RAW SAP
, through the stem to the leaves.

3. Leaves absorb carbon dioxide from the air through their

STOMAT
A.
Stomata are tiny holes on the underside of the leaves.

3. Plant cells contain
CHLOROPHYLL
(a substance which gives plants the green colour). The chlorophyll collects solar energy which helps transform water, minerals and carbon dioxide into glucose and oxygen.
4.
PHLOEM CELLS
carry the glucose, the plant’s food, through the stem to all parts of the plant.
Plants produce their own food using a process called
PHOTOSYNTHESIS
.
They produce seeds through sexual reproduction.
They don't produce seeds and reproduce asexually using
SPORES
. A spore is a cell that grows inside a spore case or capsule. The spores are carried by the wind.
Reproduction
Grasses
Bushes
Trees
They have soft stem.
They are thin and flexible.
They are usually short.

They have thick, hard stem, low branches. They are taller than grasses and live longer.
They have high branches and a thick, hard stem (trunk). They are the tallest plants.
Plant Respiration
DURING THE DAY ....
Plants produce oxygen as part of the photosynthesis. They produce more oxygen than they need and expel this excess oxygen through the stomata.
AT NIGHT...
Plants need to take in oxygen from the air. During this time they release Carbon Dioxide.
Characteristics
Parts of a Plant
Life Processes
Roots
Stem
Leaves
Types of Plants
Plant Classification
Full transcript